天文大地网与GPS2000网联合平差数据处理方法  

Data Processing Method for Combined Adjustment of National Astro-geodetic Network and GPS2000 Network

作　　者：成英燕[1] 程鹏飞[1] 顾旦生[1] 秘金钟[1] 

机构地区：[1]中国测绘科学研究院,北京市海淀区北太平路16号100039

出　　处：《武汉大学学报（信息科学版）》2007年第2期148-151,共4页Geomatics and Information Science of Wuhan University

基　　金：国家测绘局重大基础测绘基金资助项目(1469990324214)

摘　　要：介绍了天文大地网与GPS2000网联合平差数据处理中的主要数学模型、大规模稀疏矩阵的有效解算方法,用Helmert方差分量估计算法进行地面网的方差分量估计,并用该方法对我国天文大地网的观测数据及空间网数据进行联合平差,得出全网平均点位的点位中误差为0.11 m,点位精度95.5%优于0.3 m。Main mathematic models used in lage scale data processing of combined adiustment of national astro-geodetic network and GPS2000 network are discussed, an effective arithmetic for large scale sparse matrix resolution also introduced here. Helmert covariance component estimation is used in estimating covariance component of territory network. Through combined adjustment of these two networks, the avarage mean square error of 48 919 points location is 0.11 m and 95.5 % of which is better than 0.3 m.

关 键 词：天文大地网 GPS2000网 联合平差 方差分量 

分 类 号：P228.42[天文地球—大地测量学与测量工程] P207[天文地球—测绘科学与技术]